A's prospect Michael Choice is having quite the AFL season, but what can his success tell us about how stats should be presented?

Believe it or not, most of our writers didn't enter the world sporting an @baseballprospectus.com address; with a few exceptions, they started out somewhere else. In an effort to up your reading pleasure while tipping our caps to some of the most illuminating work being done elsewhere on the internet, we'll be yielding the stage once a week to the best and brightest baseball writers, researchers and thinkers from outside of the BP umbrella. If you'd like to nominate a guest contributor (including yourself), please drop us a line.

Matt Lentzner has carved out a (very) small niche in the baseball analysis world by examining the intersection of physics and biomechanics. He has presented at the PITCHf/x conference in each of the last two years and has written articles for The Hardball Times, as well as a previousarticles for Baseball Prospectus. When he’s not writing, Matt works on his physics-based baseball simulator, which is so awesome and all-encompassing that it will likely never actually be finished, though it does provide the inspiration for most of his articles and presentations. In real life, he’s an IT Director at a small financial consulting company in the Silicon Valley and also runs a physical training gym in his backyard on the weekends.

You were all watching the World Series, but the prospect man had his eye on the winter leagues and reports on some big performances.

Brandon Belt, 1B, Giants (AFL: Scorpions)
A change in both stance and hitting mechanics turned Belt from a relatively unknown fifth-round pick in 2009 to one of the best statistical performers in the game after a .352/.455/.620 season spread across three levels. Now trying to prove it's for real in Arizona, Belt has recovered from a slow start to lift his averages to .319/.360/.477 and put himself in competition for the first-base job next spring. With the crouch taken out of his stance to go with a more open setup that allows him to use all fields, he's worthy of the look. Aubrey Huff has been a great story, but next year it's time to think about his future at the position.